Any other way I could purchase the latest version without the SubscribeStar website?
In this place, just click the 'Download Now' button ;)
The new releases are posted almost at the same time on both sites, and the following post tells you the difference between buying here or in Subscribestar:
https://guapoman.itch.io/sex-gods/devlog/417979/sex-gods-new-version-public-030-...
More differences are written in the main post of the game (A few notes).
And another big difference is that if you buy the version here, you only buy that specific version, not future versions. So you will need to buy a future version in another payment, but being a Subscriber in Subscribestar, you have access to all released content while you are a Subscriber.