I've got two teles with Blackguard Flat 50s (a Baja and a Fender Japan 52-type), and one with Yardbirds (a Fender Japan custom).
All three have the four-way switch, it goes:
1. Bridge
2. Bridge and Neck (Parallel - the "standard" sound)
3. Neck
4. Bridge and Neck (Series)
Position 4 is the "extra" - fatter, meatier. For me and what I want, it works really well with the BGs, but I haven't really found any use for it with the Yardbirds, I'm tempted to put the 3 way back.
I love the Blackguards, but there is something about the Yardbirds. They're my most recent BKP, and I wasn't expecting the result, but it is my "go to" guitar for any recording at all. If I've got a song that requires guitar sounds that you'd think were "strat", "tele", and "humbucker", I will happily use my Yardbirded tele for every part.
If I was still playing live, the Yardbirded tele would be the one that went on stage (actually, I'd want another in reserve! :lol:).
Yardbirds are sweeter sounding, but still pure tele - the neck is a gorgeous tone on its own. It does rock/pop/blues/country/rocknroll, takes distortion, is really good when you want multiple guitar parts that cut through without getting mushy.
If you want a set that excels in the blues/rocknroll area, for example, and you're not too worried about much else, I would still wholeheartedly recommend Blackguards - they have a slightly "rougher edge" to them that lends itself to that. They do dirty and clean, they are absolute stunners when you first try them.
They're usable for everything else, but in comparison to the yardbird tele, they're a bit fatter and nearly always the Yardbird tele is more flexible for me.
I only have two Yardbird "clips" - both are complete mixes, and obviously there's a lot of delays and wotnots on them.
The first one, every single guitar part (about 8 or 9) is the Yardbird tele, I seem to remember there's a "solo" on the outro.
http://bareknucklepickups.co.uk/forum/index.php?topic=17322.0The second one is a mixture of Yardbirds, MQs and an accoustic. There's some heavy stereo tremelo on some of the Yardbirds - the Blackguard teles couldn't cut it for me in this particular instance
http://bareknucklepickups.co.uk/forum/index.php?topic=17917.0However, I suspect it's the Blackguards will make you most happy for a first tele set :D