We were also at a national level tournament recently using the same 360 Speed MP Lite before lockdown. The other 12 year olds were definitely bigger than my son, what we found since my racket was still in his bag (I use a Prestige Tour) when he used my racket he wasn't getting pushed around. The other 12 year olds were using stock non lite rackets and with ball speed/spin they are able to hit the racket probably out of our kids hands. I know my son can swing the Prestige Tour just fine and he doesn't get tired out. He was down 1 - 5 2nd set so he switched to my racket because he had nothing to lose, he ended up losing the 2nd set 6-7 (8-10). Normally I would say racket doesn't make a difference but in this case the twist of the racket hurt them due to stability of the lighter racket. Just some food for thought.
Also we did add roughly 12g to the handle of his Speed MP Lite.