The street price on
the Eventide Eclipse is just over $1700 USD...the price on the t.c. FireworX is slightly lower. Of course, you can pick up a used FireworX for anywhere from $1000-$1300. I bought my FireworX used with a t.c. Master Fader for $1250 around 18 months ago.
The fundamental difference between the two units is the Eclipse is a dual-engine processor, similar in philosophy to
a Sony DPS-V77 in that it has two “slots” for a range of algorithms, whereas
the FireworX is a modular-style effects unit that allows for user-design of the total processing chain.
I think many people’s perception of the FireworX as a “mangling” tool is derived from the fact that so many of its presets do just that - in an effort to show off the unit’s capabilities. Make no mistake, if you need straightforward multi-fx, the FireworX can deliver with a killer professional sound.
Both are fantastic units that can do some wonderful processing. In deciding between the two, I think the decision would come down to your facility with programming, the sound of each unit’s algorithms and the other gear in your setup.
At least for a taster, you can download the manual for each of them from the manufacturer’s respective websites.