Girls are more in to style in general. So yes girls spend more time clothes shopping, buy more clothes and so on, but not many guys have a very good style, a lot of guys just put on whatever and it looks pretty boring or rubbish. Cool if you want to take the view of "I don't care I'm not superficial" but a bit of effort gives you a much better image which means you will be taken more seriously by people.
It doesn't bother me if girls buy loads of clothes and shoes, the only time it's been an issue is when I've been in flatshares and the girls have wanted to take over communal space to store their clothes/shoes, eg the hallway is lined with girls' shoes, or all of the clothes hooks to hang jackets up etc are taken over by one girl putting all her stuff there.
There are guys that are in to clothes and style as well, and when it comes to spending money, well the guys nail that one. Guys that are in to style don't tend to do the cheap primark type shopping for their outfits they tend to aim up. Girls will come back from a shopping trip where they've spent all afternoon, and come back having spent £60, with about 7 items to show everyone. Whereas a guy that's in to style will pop in to one shop and come back half an hour later having spent £290 on two polos and a pair of chinos.