Question about HP 255 G10

1) Digitec offers the 'HP 250 G10' with 'Intel Core i7-1355U' or with 'AMD Ryzen 7 7730U'. Which is the better/faster processor? I need the computer for office, streaming and photo processing. 2) Is the 16 GB RAM offered sufficient for the same purpose? 3) Would it be possible to expand to 32 GB RAM? At what cost? Many thanks in advance