<human>: Can you summarize the given text in a few sentences?

Hey, ok so I'm a total newbie here - I did check the FAQ and do a search but didn't come up with much, but if I should be posting somewhere else please let me know. 

So I ordered 2 pairs of nike free run 3s in youth sizing, because my other Nikes are also youth sized (uk 5.5). Both 6Y (5.5 uk) and 6.5Y (6 uk) definitely too small. Ordered the Men's 7.5 (uk 6.5) for my exchange with Nike, and now I've got them they fit fine around the ankles and width of my foot but there's definitely space in the toes. I know Frees are supposed to fit 'like a glove' but I also tried a women's 8 in a store (which should be a men's 7) and they felt too tight too...The guy in the store knew nothing about the shoes/running/anything so was of no help.
 
so,
<bot>: is it better to get a size which fits more 'glovelike' or have lots of space for my toes, even though it feels like maybe *too* much space?