The Lewmar only fits certain models where there is enough room under the pedestal to fit it. Doubt this is the case with a Match. The easiest type to fit is the wheelpilot type which is OK for light use but not really powerful enough for use in more demanding conditions. The alternatives are the under deck type that drive directly to the rudder stock. There are different types of drive and which you fit will depend on the exact layout of your existing steering. The main suppliers of drives are Raymarine, Garmin, B&G and Jefa. All will have details of the different layouts available and schematics of how they work on their websites so you can see which is suitable for your boat.
You can mix and match the electronics with different drives and your choice of electronics may well depend on what you have already fitted for wind, speed, chart plotter etc. For example my boat has Garmin electronics and a Jefa drive.