If the starting price is the same, regardless of brand, the 250SX is much more for the money.
Of brand, there's a reason why every mass produced 3 wheeler other than a Honda brings a lower price. Paying Honda prices for other trikes usually won't yield the same return and if you have to replace or repair anything, expect higher costs and more difficulty sourcing parts.
If you want anything with actual rarity and as an actual investment, the niche competition trikes like Tiger and others are the trophies to be had.
The story of three wheels and a man...