Don't buy the first model you come across just because it's cheaper - electronic drums vary a lot in pad quality and responsiveness. If the pedals feel sluggish and uncomfortable, you'll lose motivation to practice pretty quickly. Also keep in mind that even the quietest electronic kits make mechanical noise from the hammers hitting the rubber pads - it's not completely silent, just way quieter than acoustic drums.
Both of the options you mentioned work well, but there's a catch: the Roland TD-1DMK is definitely more compact, but the bass drum there is pretty underwhelming, while with the Yamaha DTX432K you get better luck on that front. If you have a small apartment and don't plan on setting up a huge kit, also look at the Alesis Nitro - it has a pretty good price-to-quality ratio for the pads. All these models are in your price range and are actually sold in Russia.
Before you make a final choice, if you get the chance - try out the kit at a music store. Feel how the stick bounces off the pads, check if they're responsive enough for you. And definitely buy a mat for the kit and noise-dampening pads - that'll significantly reduce the mechanical noise and protect your floor.