Mainoo is an excellent player, United best prospect however he’s also a year older than both the players you mention.Tezgel was in the same u17 squad as Samuels- Smith at the UEFA u17 tournament last month. Neither started the first game against France , both started the second against Luxembourg - England lost them both. . The player who caught my eye was Mainoo of United , he looks a real prospect.
Whilst Samuel-Smith and Tezgel are still school preparing for their GCSE’s Kobi’s been training full time as a scholar for a year now. He is very good though.