I trained 2 Blazikens, both are at level 100, which one should I use stat..

I'd say Blaziken #2 is a lot better.

The second one.

I think you should pick the second one because the speed is only 3 points lower and you probably need a higher sp.att because of it's fire moves.

It's entirely your decision but I would use the second one it has higher stats than the first one

Well it depends on what you based you're Blaziken around attack based moves(i.e fighting and/or normal type attack moves)then I would use Blaziken #1 both for his Superior attack and his increased speed and if you have one throw a black belt or a silk scarf on him for good measure.

And if you based yours around spec.attack(i.e. Fire type moves)I would use Blaziken #2 for his Superior Spec. Attack + Spec. Defense +and higher defense.
I would say it depends on what type of enemies you're planning on challenging.But personally I'd take #2 b/c hez overall better and he's very similar in Stats. to mine except mine's stats are:
Name: Feueri ; Sex:Female
Nature: Hasty
Attached Item:Shell Bell
HP:316
Defense:212
Attack:344
Special Attack:288
Special Defense:172
Speed:202

And Stats. Are legitimate, not hacked or cheated,its simply the freak creation of a multiple Pokemon crossbreeding.The end result is rather impressive, no?
Yes unless ur's is like entirely based on fighting moves...Why you would do that I don't know...but if he has at least one good fire move,and if not teach him one,go with Blaziken #2

~Engel der Bosheit

I think you should use the first one. Cause it has more attack.

Ummmmmm......

That's hard
I would use the other one
They are very good

I say blazikin #2 is a better