Neither the RED.
I don’t know if you speak of personal experience or just rumors, but I’ve had 40+ gigs this year with the RED ONE and had never a heat related problems with the RED, and I cannot say the same with the cinealta 750, since I witnessed 2 of them get fried in a Spanish major tv series on a hot location.
These ‘gel packs’ stories appeared after Che, but these were prototypes cameras.
The RED has the higher resolution, latitude, color, versatility of raw and 35mm depth of field, but both the shooting and postproduction needs a film-stle crew and mindset.
The Cinealta has much lower resolution and color space, 2/3inch dof, but a more ‘ENG’ style operation and straightforward post.
And is quite noisier, by the way. 😉
Cheers,
Jose