My friend told me that Destiny is going to sell more.

And I’m sure plenty of people will disagree with you as well. Activision always chases the cash cow and sadly right now that’s shooters. I hope it changes too, but that doesn’t take anything away for destiny or Titianfall for that matter. The mundane FPS could go away though and I wouldn't be bothered. 

I'm not really a fan of either EA or Activison the majority of their games are very dull.  I'm glad that NBA Live 14 failed both finacially and critically I pretty much saw that one coming a mile away.  NBA Live was decent for a while but 2K pretty much has been then king of basketball going back to the first game on the Dreamcast.  Even during the PS1 era NBA Shootout was better for a while.

             One 360 PC PS3 PS4 TL
Titanfall  2.75 3.5 .75   -      -   7.0m

Destiny   1.75 2.5  -   2.25   2   8.50m

LT not including digital or bundles where Titanfall might get a break. Microsoft won't have that many exclusives to push early but Halo 5 is the obvious choice next holiday. Joe's numbers for Tfall on X1 would be a really high percentage of potential buyers at launch so I'm guessing lower there. Wild guess at PC.

Destiny will have more competition,a lower ad budget and it's not a traditional shooter but it will have about 3 times the potential nexgen buyers at launch. A lot of shootists may get the new boxes and there may be very different performance and visuals on the old ones. So lower numbers on PS360 than his. Expect launch issues like any MMO. Negative press running into October won't help. Bungie won't be immediately embraced by PS loyalists and Xbox fans may be put off by their choice of new best friend. Lots of variables obviously but there's my guesstimate.

Exactly. 

Overall, Destiny will sale much more than Titanfall. I predict at least 3x as much. And just on Xbox One alone I feel that Destiny will still edge out for the victory.

Destiny.

Destiny will more than double titanfall total sales

eg.:
Titanfall E3 gameplay vid: 1.677.549 views
Destiny E3 gameplay vid: 6.015.712 views

Destiny, it will have a bigger marketing budget.

Titanfall wont sell a lot of xbones because even a proven system seller like Halo will have difficulty moving a system which costs 500 dollars. And its also on 360 and pc.

Destiny is destined to win this one.

Tough call, I'm going to say Destiny because it's on more platforms. Titanfall can really explode though