Inscryption is not close to StS in gameplay style. It’s more narrative and the card gaming strategy takes a back seat, it’s also very breakable with certain strategies. Not to say it is a bad game, just it doesn’t sound like it’s what you’re looking for.
Monster Train is a solid game, you’ll get more replayability if you get the DLC later since it impacts core gameplay.
I would actually recommend you check out Griftlands, it feels closer to StS playstyle to me than Monster Train. In Monster Train it’s a lot about supporting the units with your deck, whereas StS and Griftlands are more about using your deck for the combat.