Snail speed controller or Rokuhan RC02

Rokuhan RC02 is a PWM controller right?
>YES.
Does the constant light -functionality requires some chip on the loco to work, right?
>No. It is only a diode/capacitor storage principle, proprietary to their cars (but you could make it yourself.)
When the power is reduced to zero, in the background, there are ‘transients’ long/high enough to recharge the capacitors well stopped, yet not enough to move locomotives

How does the Snail speed controller compare to the Rokuhan? Is there any notable differences?
>Snail is near 1/2 the size.

Also since I live in Europe, we get AC at 230 Volts and 50 Hz, is there a version of the Snail power adapter that works in European grid? I guess Rokuhan has a version. Somewhere I read that Snail speed controller has - in the middle so I can't hook just any adapter to it. I guess 9 Volts is correct, but how many amps thou?
>Both use world-wide universal voltage, with more than enough current, but marginal/for a MTL F7 (OK for their GP’s).
HOWEVER, the Snail is Minus (-) tip whereas virtually every wall-wart is Positive tip (+). Use the offered one or ANY minus tip 9~12V, 1A or less.

Also, do I need to go fully PWM or can I mix PWM and "traditional DC" in a scenario where a loco travels over an insulation point (both rails insulated) from a PWM track to direct DC track, will bad things happen?
> ALL PWM or ALL DC! Never allow DC into PWM (exactly the same as DCC). If you are using Diodes to ‘stop’ the train, that should be OK.
Thanks in advance!

BR,
Eino