The difference between Will and Michael so far is that Michael has come and played in our first team and actually looked at home.
Will is a good striker, probably better to say a very good striker but unfortunately the only level he's been tested in is the reserves. Michael has now had the opportunity to go to a top championship team and is not looking out of place there either, in fact their fans are raving about him as future Manchester United and England starter.
As Cevno also said, in 2 years time Rio is likely to retire, Vidic will be older and unless we sign any other defenders we have Smalling, Evans and Jones which leaves a massive opportunity for Michael if he excels in a PL team next year. Hopefully if Leicester get promoted they will take him back for another year.
Will already has 2 world class strikers in front of him, 2 young very good strikers and now the added competition of Henriquez who is younger, already an international striker, been a first team player for his previous club and now having a PL loan. So that's 5 strikers at this point in time who are ahead of him. We've also got young Wilson who I think is very good and he's almost 3 years younger than him. Wilson has always played a couple years above his age group and I expect him to be an u21s regular next year.
Unless we really do start playing this 433 formation more often the route for Will to the first team is just so much more difficult as he's already got direct competition for the 5th striker role and in a year or 2 I can see Wilson sneaking into that bracket as well.
When you take into account his unfortunate injury, none of us know what level he will come back at.
He may or may not make it here, but right now taking everything into consideration I think Michael is looking the likelier twin to make it here, that's not to say Will cant either but I at the very least think Michael will get there first.