From what I have seen, at this age Tuulola seems to be using his body as an advantage better than Joensuu. Tuulola likes to play physically and play the traditional North American powerforward game. Never really saw that from Joensuu.
Very hard to say at this point how much offensive upside Tuulola would have, but 21 goals as a 16-year-old in junior A is definitely is a nice number. He obviously needs to improve footspeed, but that's normal given he is a 220 pound teenager who just turned 17 (Not everyone is Puljujärvi). He got strong genes from his father, but we'll see if he got any fast genes also. His dad wasn't very fast, but was rock solid. Looking forward to seeing his progress next year as he is a pretty unique prospect for Finnish hockey. We don't have many players who like to initiate contact, but also have the abilities to score goals. Tuomo Ruutu may have been the latest of this kind.