I have the toasters in my T42.5 and a blade in my RB45. There isn't a lot of difference, I do find the blade version to be a
touch/hair/smidge brighter, but not worth seeking out. A very small turn of the treble knob at the amp will remedy that. I personally like the appearance of the blade version, but prefer the 1st Gen toaster 70s thing for being older and more funky.
Also, if you are going to install a pair of these in a bass. I figured out a wiring with a regular DPDT switch that can get the split coil option to use magnetically opposite coils, so you can still get hum cancelling when they are combined. When the T pickups are mounted and oriented in the standard way, they split to the bridge side coil, which are the same magnetic polarity.
When I did my T42.5-I wanted the inner coils active when in split mode. I originally wired them both up to ground out the red wire and mounted the bridge pickup rotated 180 degrees in the pickup ring to get the active coil to be inside. Worked great, sounded great, had 60Hz hum. No biggie, I'm used to and accept single coil hum. However, after thinking about it, this wiring hit me like a lightning bolt. It was a real "a-ha!" moment--a sort of ABY switcher box approach to the series/split modes. Rotated the pickup back, tried the wiring and was so happy it worked!
This particular wiring will split to the inside coils. If you want outside coils, just substitute 'neck' and 'bridge' wiring.