GH4 VS Canon 60D for stills

Hi everyone, I use Canon 60D with tamron 17- 50 f 2.8 e 70 300 f 4/5.6 for stills, and I have bought a lumix gh4 with 12 - 35 2.8 and 35 - 100 2.8 for video.

Is there a difference between the two for stills (all kinds, from landscapes to portraits)?

I've always used gh4 just for video, until, recently, I decided to try and take some pictures with it. From the quick test the picture did not seem different from the canon 60D. But since to do a serious test I would need a lot of time and at the moment I have no way, I wanted to know if in your opinion, for the best stills's quality, I should hold them both and use canon for photos or if I can sell the 60d with the two tamron and buy a telelephoto m4 / 3 lens (which I would use only for stills) and use the Gh4 also for photos, without loss of quality ?

We all have the standard of our own. As you have both cameras, you are in the best position to judge which one would work for you.

It is a fact that many dslr shooters converted to M43. And there were also some M43 users change to CaNikon/Sony or use dual system.

The only point worth to note is better using of  the live view of GH4 and to have optimal exposure (harder to fine tune on dslr). It can keep noise under better control as well as to have more headroom to PP if shooting raw. The <1 stop sensor advantage of 60D might not really observable if you could squeez the best out of GH4. Be bold to experiment on your setting vs live view, ignore 0ev metering, trust your own eye and you might achieve unexpected result.

However, GH4 is already an old model and on non pro video, the cheaper and newer G85 was said to offer comparable or even better video. Not to mention the IQ on still, says IBIS and Dual IS for more effective stabilisation, removal of AA filter for sharper result, better jpg engine, reduced shutter shock, DFD for improved CAF etc. Should worth to consider GH4 is no longer the best of M43 today.

I would not expect a significant difference, the cameras are nearly tied on dynamic range and megapixel count. For my personal use I think the AF accuracy and the ease of getting the best exposure setting would give the edge to the GH4. And those two m43 lenses you have are among the best in the system.