Sorry,been away at gigs too!!
The L500s are ceramic and wound with a finer gauge of wire than the Nailbomb hence the toppier tone and tighter bass.
My suggestion is wait for the Cold Sweat to come out.................I've been roadtesting for the last couple of months and it's awesome.
Jake based his SITD tone on SD JB-the proper ones not the massed produced ones that they inflict on us these days.Based on that assumption the Nailbomb is a close hit.I've been gigging NBs in my polka Vee and love the tone for the Ozzy stuff.
Another consideration is ..................The Mule............I always play Shot In The Dark and Bark at the Moon on my LP Goldtop loaded with Mules as it feels just perfect for these tones-remember I play in an Ozzy tribute when I'm not chained to the winder :lol: