I've played the CL/LF, Illuminators, and SEs in the same guitar - a friend's 2HB parts tele - and to my ear they sound damn near identical, with the general trend that I wrote in my other post: I've genuinely heard SD JBs that sound more different because of the differences between the 80s and modern models, or just between individual pickups, and you could easily make up this ground with about half a degree turn on your amp's EQ.
They feel pretty different though (the bridges more so than the necks - those just feel like you have a cranked MXR compressor on all the time). The CL feels way stiff and to my hand kinda harsh - I pick pretty hard and I have a bass background, so I tend to push the strings in towards the pickup a bit more than most guitarists, while the owner of this tele (who picks more normally) doesn't get that harshness so much. The Illuminator is less stiff but IMO it's a bit tubby in the low mids, so especially if you play kinda hard you get this really strange response where the treble and upper mids take a sec to come up in the sound. SE IMO is less stiff like the Illuminator but doesn't do this so it's my favorite one for the bridge.
As far as neck, my big issue with them (and why I kinda agree with Darth Phin) is that they sound different in the same way that the matching bridge pickups do, but they all feel so compressed that I could frankly not tell them apart when playing. Just off of hearing the sound, the SE is my favorite because I prefer brighter amps and it works well with that, Illuminator is so-so and the LF I really don't dig because it feels really indistinct. As far as playing feel I'd rather go for an Air Norton, which is just as fat but retains some dynamics, or a D-Activator X set to do something kinda like Michael Romeo thing (Tone Zone neck/X2n bridge) which sounds similar but IMO responds to my playing a lot better despite still being way too OTT for me.
I'm still curious, it's just that in my experience this particular line of pickups is a pretty shallow rabbit hole to dive into - OSHA wouldn't be too keen on that.