both of these are good choices for what type of riding you do
the t hall is goin to be the softest and the lightest of the 2, it has the ar50 sidewall construction, which is a mix of cap and abs the cap is in the tips and tails providing a light ski with a low swing weight which helps with spins, the cap construction provides a durable topsheet to help against chiipin when you accidentally bang your skis together. the abs underfoot makes the ski forgiving when landing jumps and hitting rails, and it adds durability when bangin rails. the thalls are soft in the tips and tails but stiff underfoot to handle medium jumps. armada is known for making some pretty bombproof skis like k2 so thats not much of a worrythey are wider this year so they have an added all-mountain ability
the domains are a rocker, zero camber, rocker, ski, it is lighter than the past years. the domains are buttery in the tips and tails do to the rocker, the flat camber is good for it helps in engaging the butters, but the flat camber does have a down turn they may feel less lively than a cambered ski when jumping and carving. but the construction is fun, the flat camber and rocker helps the swing weight on rails for when you bring the ski around you dont have to worry about catching. they are a wider than normal park ski being 90mm underfoot which can handle the all-mountain better, and the rocker helps float in a "little" bit of pow. the wider platform helps in the park when hitting jumps and rails, it can help you stomp more (dont forget to afterbang) k2 is known for making some really bombproof skis, they may chip but hey skis get like that. they are an abs sidewall construction which is durable and forgiving, k2 also added a larger edge to all their park skis this year to take the abuse of rails and shit which is an added bonus.
both are good choices it could come down to price and size the thalls 181 measures to a true 179-180, the k2s on the other hand measure long so the 179s will measure close to 183, they are close in sizes. for anyone the longer size is beneficial for it can help in gaining more control and you have a more stable platform to land on. i believe the domains are the cheapest by 50, so its up to you if you want to try the rocker oin the park go for it cause rocker is in, and even if you want to stick with a standard shape the thalls will be fun, so the choice is yours
have fun out there and progress, dont forget to stay loose and steezey
