Well, the problem with mechanical keyboards is, that the actuation point is at half of the distance (not sure about the other switches).
It's all about how hard you press your keys. When you are playing slow enough maps and you are used to membranes, you might end up hitting the notes too early unless you hit your keys hard enough.
If you press your keys with enough force to make them travel to the bottom in less time to actually make any difference between the actuation point and the bottom, you are going to be fine,
BUT that only applies if you are stable enough to keep the rhythm properly. One of the solutions is to use O-Rings. They reduce the travel distance depending on the thickness (and they make your keyboard way more quiet, but only if you are not using the clicky switch). They kinda shift your actuation point, so you can almost feel like playing on a membrane keyboard with no resistance (depending on the switch). I'm using 1.5mm on every key and 2mm on 4 separate keys for slower maps, and it's really good. It gives you just a bit more stability once you get used to them. They might feel a bit uncomfortable in the beginning.
They are very cheap and you can get them in packs of like 120 / 150 / 200 pieces.
Higher actuation might make it a bit harder to keep your stability once the Overall Difficulty increases, especially when you get to the OD~8. The timing in Taiko is really harsh, and it's almost impossible to be stable enough to play on very high OD maps unless you are experienced and you know your hardware. For example, I'm playing on QPAD MK-50 (Cherry MX Red) for 5 years and my stability is still lower than playing on a membrane Logitech K-120, but at this point you just trade stamina for speed and playing time.
Still waiting for my scissor keyboard, so I can't compare them for now, but I played on a laptop keyboard for a while and it was really good, so I have to try that again