New Holland bale accumulator vs Steffen systems 950 accumulator

I am looking to grow my haying operation and by doing so I am looking into some sort of accumulator since high school help is harder to come by anymore I like the new Holland's but how tight and heavy do the bales need to be for it to work properly and with the Steffen accumulator does it have any issues with the hydraulic timing or anything else

Thank you

New Holland bale accumulator vs Steffen systems 950 accumulator