Can’t see much difference between them either. Okay, so I see you answered your own question.
Its always a good idea to post links to the bikes so we don’t have to go scrambling around looking for the models and there maybe differences between model years too.
Giant as the name might suggest are the biggest maker of mountain and road bikes and also make for other well known brands. You’ll pay a premium for the name so you’ll get better value from own brands like Boardman, B’twin (
Decathlon), Pinnacle and others.
The Talon has a 1x drive which is fashionable right now but means you’ll have fewer gears and bigger jumps between them than a 2x or triple set up.
Where will you be using it mainly? Off road I guess. On the road those fat tyres are going to very draggy.