You forgot to add in the plus for BotW having physics to it's game, like being able to interact with objects, cutting down tress, pushing boulders, cutting grass, moving through and having the grass react to you. Having weapons like arrows that are on fire and then firing them in the water, which then puts the fire out, yet you can still travel a far distance and still collect that arrow under the water.

The gist I'm getting is 'there is a difference but how serious the dif. is requires us to find other ports to look at.'

Are we going to have to wait for Sonic Forces then to get a good read?

So far there has been zero proper releases that could be compared between those systems.
Sure you can take Lego City Undercover (last gen port) and Snake Pass (low budget indie game) and notice quite a few differences there, but the real test comes, when Swith gets an AA to AAA multiplat. We possibly have to wait until NBA 2K18 releases in September, but even then the game isn't all that demanding.

It doesn't matter too much imo.....

Pretty much. When the same games release on both systems in any sort of amount we can actually get together and discuss. Trying to look at games that accomplish different things (loz does not try to be the same graphically as HZD) will get us nowhere. So far we have the two games you discussed, and I think that we can comfortably agree that games that do not try to push the graphical limits can look pretty much the same across the platforms. Dragon Quest Heroes looks vastly better on PS4. That's currently where we are. It could change though as more games release.

The PS4 is around four times as powerful as the Switch. Best testcase will be Mario Oddesey vs Ratchet and Clank or Crash since those are also cartoony games.

It goes a little deeper than that, I mean it won't even be the exact same game on Switch at 720p and 30fps. There will be less effects, and more than likely a cut back as far as foliage, textures, ect. I honestly don't think we will ever get a clear indication as I don't think any third parties will ever take the take to properly port a massive AAA game to max the Switch out.

Even Sonic Forces is only going to be good for limited comparisons, as it's fairly technically reserved and was designed with the Switch in mind. 

The real question is how will the Switch deal with games built to make effective use of the PS4 and X1's hardware. Stuff like The Witcher 3, Battlefield 1, RDR2, etc. Switch games have to be built with its portable mode as the baseline, and that widen the gap between it and the PS4/X1 to almost the size of a generation jump. None of those games are impossible on the Switch, even a PS2 could run TW3 with enough scaling, culling, and re-engineering, but its considerably more work than porting between the PS4, X1, and PC. The developers of such games have to think a port is really worth it to bother, which is likley why all the ports so far confirmed have been mid-tier (tech wise). Dragon Quest Heroes is probably the most demanding 3rd party title so far released on the Switch, and even the PS4 is considered fairly average.

If developers decide it's too much work, there's a chance we'll never see a genuinely demanding PS4/X1 title make its way to the Switch. I personally hope that's not the case though, as at minimum it'd make for interesting discussion. 

  What? snake pass on switch was the less worked version of all 4, the ps4 and xbox was already being worked on for 6 months, they got the switch version running at basic level in a week and just had a couple of weeks to work on it, that's why some stuff were missing on launch like graphic effects and time trial.  they had to patch it later with the update and where the hell did you take that lego had more work put on switch than the other versions? warner never said that, you're just pulling data outta nowhere to make your narrative.

In the lego games, the draw distance is set futher than the PS4 or XB1 versions.... so you dont notice texture pop ins as often.

on DF they showed fences ect, where just invisible because they where out of load distance, while the polls for the fences wherent.

It looked bad. I think the Switch version is better for that simple reason.

Also time spent/set aside to port something doesnt nessarily mean more work was done. The Lego game looks like a lazy port for PS4 & XB1.

(or maybe they learnt from the mistakes or errors, after seeing the final results of the ps4/xb1 ports)