I want to describe a new product which is an improved version of an existing one. The new product has all the features from the existing product, and adds a few new features.
I am looking for a nice way to phrase the above, specifically the verb which is used to say that the new products has all the features from the previous one:
- Product X keeps all the features from product Y, and adds ...
- Product X retains all the features from product Y, and adds ...
- Product X maintains all the features from product Y, and adds ...
- ... other?
Retain
is your best bet, imo.