This has an identical feature set but loses the keyboard. So, you get the latest Nord analogue modelling engine and a 'streamlined' interface that's designed for fast programming.
It's also worth noting that a few features have been added to the A1 since January. The Like function enables you to temporarily store up to 50 versions of a patch while you're programming before committing one to memory, while the Mutator option (taken from the Nord Lead 4) lets you create a variation of a patch by adjusting either certain parameters that conform to set rules, or by randomising all parameters.
There's also the Unison mode, which is designed to add that all-important analogue-style fatness.
The Nord A1R will ship in June priced at £1049. The standard A1 will be available from April for £1249. Find out more on the Clavia Nord website.