What do you guys think?
For some the obvious answer may have been that Nintendo would've won cause they were far more Iconic than Playstation first coming out the gate was, plus you would get all of Nintendo's legendary exclusives along with far more great 3rd Party games compared to PlayStation where it's exclusives were farrr less iconic and big compared to Nintendo exlcusives and 3rd party developers may have been more hesitant to support the PS1 since it was a newcomer with far less brand recognition than Nintendo at the time.
However, I see the answer more complicated and less clear cut than than that. For one thing we have to not that Nintendo up until the Wii was never really big Europe. The NES and SNES neither hit even 10M units in Europe as Nintendo never really focused on marketing towards that region and used 3rd party distributors to sell their systems in Europe, which obviously did not do a great job in capturing the European market. Sony on the other hand with the PS1 put immense effort towards marketing the PS1 in Europe, making it big over there as the PS1 would go on to sell 31M units in Europe alone. I doubt Nintendo would've even came close to that number even with the N64 getting full 3rd+1st party support simply cause Nintendo didn't really care much about Europe. So Sony probably would've had a huge sales advantage in Europe, making it more difficult for the N64 to beat it.
Also, if the N64 had a CD-ROM drive along with how powerful it was at the time, it probably would've been more expensive than the PS! and a tougher sell to some consumers. The N64 was priced at 200$ when in launched in 1996, which was the same price as the PS1 at the time which was 200$ WITH a CD-ROM drive. Since the N64 was far more powerful than the PS1 and would have a CD-ROM drive, the N64 would probably have to be priced at around 300$, which is 100$ more than the PS1. While Nintendo's brand recognition, exclusives, and 3rd party support may have made people still buy a N64 over the PS1, it's for sure a far tougher sell for some who'd may want to spend 100$ less to get a PS1. We've seen how competitive a relatively obscure company like Sega was able to get with the Sega Genesis just cause it was priced 50$ less than the SNES, a 100$ difference between a CD-ROM N64 and the PS1 may have been huge.
Also, we have to keep in mind that Nintendo's kiddier image compared to the PS1 may have been another advantage for the PS1 since Sega was able to exploit that with the Genesis.
So tbh I'm on the fence with it.