EasyLover :
Both companies offer good quality products which is beyond any doubt. But Asus products are more innovative than others. Asus quality of components is top notch and their design is quite appealing. Both of these mobos pack good performance potential. You can't go wrong with either of them.
But remember Hero VI is ATX form factor whereas MSI Z87M is micro ATX card but it packs powerful gaming potential.
Both of these boards are Z87 chipset. Are you planning to overclock? Why GTX 750 Ti?
Spend wisely on mobo, save some bucks and get high end GPU as GPU matters for gaming not mobo.
No overclock for me, had a bad experience once... as for the GTX 750 Ti, it's the only one I could find to fit my gaming and price needs from the retailers I can buy from. Anyway thanks for the tips, I'll keep them in mind when I start spending.