Considering the new NF coils haven't been released & only a handful of testers have them + the Coilteks only been out for a few weeks I don't think your going to get any 5000 v 4500 comparisons. To be honest I don't think that many people would even be worried about or bothered testing them 5000 v 4500 as the difference in machines is negligible. By rights the 5000 should have a small advantage with improved electronics & possibly the fine gold timing in some situations but like I said most would agree it's negligible. In fact many prefer the 4500.
Most would only be concerned with performance of either coil on their own machine, whatever that may be.
My main question on these new coils, & in particular with the Coiltek one being released as for the SD/GP/GPX series, is has anyone used one on a SD or GP series & how did they rate it on those machines?
I've got no doubts they will work fine or have improved performance on the GPX's particularly the 4500/4800/5000's but the SD/GP use interests me. Maybe they may spark the old girls up a bit too?