I am guessing the Eheim will be easer to clean. This is not the only feature you wan't to know though.
The Eheim's max flow is 390 GPH where as the Fx5 is around 600 GPH.
Its a tough call, The Eheim with 15L of bio media and 5L of mechanical media blows the Fx5's 5L of bio media out of the water. Its just sad that the eheim doesn't have a higher flow rate, especially with the 15L of media. Ehiem just won't break that 400 GPH barrier except for one 900gph (at zero head) filter
You have a 193 gallon tank. 2 cycles an hour with the Eheim vs 3 cycles an hour with the Fx5
In this case, I would go with the Ehiem 2260. Its the same price if not a little more than the Fx5 and you get the media too. The fx5 doesn't come with media so you will be spending about that in media after buying the fx5.
So, I would go with the Eheim in this case.
Unless you wan't to modify the Fx5 Internally which would give you 13-15L of bio media and a 600 GPH flow rate

Sounds better, but its up to you.
Right out of the box, Eheim and a couple power heads