Can someone who knows more about showers than me (not difficult) advise
on which Mira shower to get (for our new en suite)?

We are getting a Worcester Bosch Highflow 440 combi boiler. We
currently have a Mira Combiforce 415 in one bathroom (been there for 10
years) and it works very well. The easy choice is to just get another
- I'm amazed and impressed to see they still make it!

Alternatively, I'm tempted to go for one that offers control of flow
rate. This may prove useful as my wife sometimes complains it comes out
too fast!

Problem is that there seems to be such a confusing range of models. Are
the differences merely in terms of style, ot are the differences more
than skin deep? Can anyone advise or make a recommendation, and alos
advise of the cheapest place to buy? Thanks.