My 2 cents. I really like my 29er but I have never tried a 27.5. So I will not get on tire size but The 27.5 are not as popular as 29 around here.
Giant Talon has lockout fork
Giant has 1 higher Rear Derailleur.
The Felt has 180mm Rotors VS Giants 160mm.
Your paying Msrp for the Giant and $50 off MSRP for the Felt.
Giant has 2x color choice VS Felts 1x color.