After effects help 720p vs 1080p flow

i have piece of footage going working in ae.
original 720p @ 60fps. better leaving alone , working in ae or should convert 1080p final project going in?

 

wirelessly posted (iphone: mozilla/5.0 (iphone; cpu iphone os 5_1 mac os x) applewebkit/534.46 (khtml, gecko) version/5.1 mobile/9b176 safari/7534.48.3)

it's best leave native file dropped 1080p comp.

 

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