I have been shooting Easton CarbonAeros 400's. My brother has given me some Gold Tip 5575's. Are these equivalent? I don't know what a 400 wt. is, I grew up shooting Easton XX75's and their weight and thickness was measured in 4 numbers like the Gold Tip's. Thank you for your help. SORRY, DIDN"T NOTICE THIS WAS THE FOR SALE FORUM, please delete MODS.