- Start-up is pretty much the same. Motor to 15%, open throttle until it lights off, monitor from there. Don't try to modulate, it'll flame out(1).
- There is, typically, no GEN OUT caution light.
- There is only one light for both fuel boost pumps.
- Fuel gauge is in gallons.
- If you figure on 30 gph fuel burn you will have plenty of reserve.
- There is no noticeable shift in c.g. with fuel burn.
- You can (inadvertently, of course) leave the fuel valve on without draining the battery (a boost pump is not "hot-wired" to the battery).
- Anti-ice device utilizes an electric motor. If you're in the habit of checking it you can be sure the motor will fail in the anti-ice ON position.
- Passengers can sit anywhere they want- it really doesn't matter.
- It's slower than an L-model (100 knots) - you'll think you're dragging an anchor.
- Slows down quicker to approach speeds than an L-model.
- Lateral cyclic is less sensitive.
- Pedals seem to be more sensitive (and don't have the big weights attached to them on the underside).
- Weaker yaw stability in cruise flight.
- Landing gear is (much) narrower, less "springy." It'll seem strange, like the skid is right under your butt.
- Door latches can be one of three different types (depending on airframe age/modifications/upgrades).
1) Some C-20B fuel controls act in a way that is startling for first-time users. On these, when you light it off the TOT will suddenly rocket for the moon only to "magically" stop right at the redline. You see the rate of rise and in your mind you KNOW it's not going to stop...but it does...somehow. Until you get used to how YOUR ship starts it can be quite a learning (read: heart-stopping) process.
When starting a 206B with a PROPERLY TUNED fuel control, you should be able to go right FLT IDLE upon lightoff and the engine will start without any intervention on your part - hot or cold. If you find that the TOT consistently goes up into the transient zone, then you should have that corrected for it is a discrepancy.
2) The B-model seems noticeably rougher in all flight regimes than the L-model, due to the lack of nodamatic mount for the transmission, of course. The B-model always seems like it's "hammering" along in flight compared to a LongRanger. Much more of a perceived "two-per." Hard to get used to. The B-model also has a slightly more "sporty" feel to it...less rubbery than the L, again because of the different trans mount. (Having said that, the B will never be mistaken for an H-500.)
That's about all I can think of at the moment. The B-model is a fun little scooter. It's much lighter than the L-, so as others have mentioned there is less total aircraft mass/inertia to deal with. It's not so bad going from an L- to a B-, more of a problem going the other way, I'd think. Once you get comfortable in both, there's not a lot of real difference between them.
Enjoy!