They both suck to do packings on in the future. Roped hydros have safeties so they need more indepth 5 year testing, they take longer to install cuz the extra guide rails for the rames head, but they typically ride nice and are very smooth. Telescopic jacks are typically quicker on the install but if you're out of plumb on the install you end up with multiple packings wearing out and leaking... Im sure I'm missing some other points on each but you could make a good argument for either