at a glance, Sinch is nearly double the price of xp at $1599. no fenders standard. no rack standard. I think the Sinch 500watt/750watt peak motor is less powerful than the lectric xp with it's nearly 1000watt peak. It does have front suspension but so does the Lectric nowadays. If you were lucky enough to order an original fat tire xp I'd suggest waiting it out. If you ordered the 3 inch tire Lectric 2.0 and have the extra cash the fat tire Sinch appears to be a good bike also.
Sinch
Lectric XP 2.0