Whilst FZRA is quite correct is saying that Boeing and Airbus are different, what you must appreciate is that what is common is the inertia/momentum compared to a light ac, not to mention experiencing the power/couple.
Again he is quite correct in saying MCC/CRM forms a critical part of any airline assessment, but to have experienced previous of that size of ac all goes to help in providing a competent performance when hand flying it.
I would imagine the quality of instruction at these well known ATO is never in any doubt. The more effort you put into the course, the more you get out of it.
You will need to work harder compared to the light ac flying phase.
Demonstrate your learning curve and ENJOY it !