Eagle rare and BT are from mashbill #1.I agree. Buffalo Trace and Eagle Rare come from the same mash bill (mash bill #1) as Weller. Different aging and proof of course.
If you enjoy the Weller, Eagle Rare will be up your alley and you'll find it appropriately placed between Larceny and Weller in price and taste.
All Weller (and pappy) is a different mashbill that uses wheat instead of rye.
I like 107, Special Reserve is a average bourbon. But glad you love it!
ETA: someone beat me too it. Sorry to pile on.