Please see the below difference between hydraulic and electric system.
Hydraulic technology: good performance with competitive price. Very powerful and strong seat motion. Comparing with the electric technology,
The maintenance for the hydraulic technology: need to refill the hydraulic oil when the hydraulic oil runs out. Also every 1-2 years, need to change the hydraulic oil.
If you have the budget limited you can buy hydraulic system as the price is lower than the electric but the normal audience can not find the difference when they watch movies in hydraulic platform.
Electric, the best technology for simulation now. The 6 servo motors offer the whole platform power to move and simulate. It can work directly under the normal 220V. The motion effect is more accurate and softer than the hydraulic system. The electric platform can stop any place from the top to bottom. The biggest advantage is that the motion speed is adjustable. So the drop effect is very strong and with speed, make you feel like you are falling down with heart bit and screaming.
The maintenance of the electric technology: there is almost no maintenance needed for the electric one, no need hydraulic oil, just the electricity.
If your budget is ok to reach electric system price then i suggest you to take electric system.
Let me know your comments.
Thanks and regards!
Cindy