Well, not totally, the FX5 does have + points (although myself id buy Eheim, always have and always will)
"CONCLUSION A matter of price
While the Eheim is the clear winner in the performance stakes the decision is not clear cut. The Eheim is the better biological performer and has a better % flowrate when full. Its a lot quieter and holds a lot more media and uses less power then the Fluval. So its a no brainer to the Eheim on most areas right? Well no ... The Fluval still does a excellent job its a bit easier to set up and it does a slightly better job at mechanical filtration and and here is the big kicker .... IT IS ABOUT HALF THE PRICE OF THE EHEIM So while the Eheim is clearly the better filter here I cannot honestly say its twice as good as the Fluval... issues of reliability and longevity not withstanding. If moneys not a issue its got to be the Eheim but the Fluval is a very good filter and its attractive price is going to win it a lot of fans. As for me personally I like the Eheim better but I also have a few FX5's for tanks where I can't justify the cost.
The only real winner here is us ...we have 2 great filters to choose from that both do a great job."