I agree with you. Broja is a technically better and mentally more stable version of Werner. Broja also has his weird misses occasionally, but his confidence does not get dropped that badly, especially when you compare it to Werner. Broja missed some sitters already in PL, but he still scored his goals.
Broja reminds me of a young Fernando Torres. Does not mean he will reach his levels, but he is very promising.
Broja and Lukaku can play together. They don't have that much in common, apart from height. Broja is more agile like you said, while Lukaku is a bulldozer. Sadly, Tuchel did not try Broja out more. Hope Broja scores around 15 goals this season and then Tuchel has to give him a chance next season. Scoring 15 goals in a team like Soton is not easy