I am told that a diamond coated blade is best for cutting L shapes in a marble wall tile but which is the best and easiest tool to use for the job - an oscilating multitool or an electric wet tile cutter ? I expect that the multitool would be the best for cutting curves, but it's unlikely that I will need to do so.

electric wet cutter..

As above, an electric wet cutter for cutting, multi tool is good for polishing but will not have the guts to cut as well as a cutter.

I use either a wet cutter or an angle grinder with a diamond blade. For curves you can get special blades for cutters that look a bit like saucers, but I have used a normal flat blade to get a curve.

electric wet cutter bridge type , and angle grinder for some cuts

same as miss Tiler for me..

Thanks everyone. Before posting my question, I had emailed the technical department at Bosch regarding their multitool. They have since told me that the oscilating diamond coated cutter would not be suitable for a marble tile. Didn't say why.

The tool hasn't got the guts to be used as a grinder.