Hi there,
First of all, congratulations on your purchase! I love HSS strats, theyre so versatile.
I never tested Bluesbucker at all, but one thing to keep in mind is your HSS uses 250 kohm vload, unlike your lester, this will definitely roll down some treble and air outta pickup.
So it wont sound the same. Whether it will sound good or not in different wood and load, is another thing. Ill let someone more experienced with this particular pickup fill in.
I can understand why you dont like the Atomic, its essentially a Duncan JB but with slightly different wind, less character and not as huge midspike. Lots of people dont like that pickup. Specifically if they want something more traditional sounding.
Regards,
Cory