Quest 3S is available in two storage models, 128GB for $300 or 256GB for $400. Both models come with the same Touch Plus controllers included with Quest 3. Alternatively, people in the US can get a Quest 3S from $20/month for 128GB ($25/month for 256GB) over two years, which includes the Meta Quest+ games subscription service and Meta Warranty Plus.
The 3s is just a quest 2 with color passthrough and better SOC minjus headphone jack. Probably an overall downgrade for PCVR lol.