I have always had Panasonic but tried the Oly and found the IQ to be better. They have something nice about how they render the image. Panasonic colours look a bit odd and have not been as good as Oly. I now also have a Panasonic G80 which I must say is an improvement over older Panasonics. It's...
The Oly is smaller but the Pana is brighter. I would go Pana every time but as you said there is little / no difference between them. I did hear that the Pana Mk2 was slightly better for IQ. Can't remember where I heard that so may/may not be true.
Both great lenses.
The Pana/Leica 100-400 will give you the best IQ and longest focal length. It's a wonderful lens! If that's a bit pricy I would go for the Panasonic 100-300mm as it is generally better for IQ than the Olympus 75-300 (not much in it) plus it has brighter apertures so better in low light...
I use the Panaleica 15mm f1.7 on the GM1. I use the Oly 17mm f1.8 most of the time on the E-M5 MkII but I also have the Oly 60mm f2.8 macro.
I also have the 12-40mm f2.8 pro zoom which was part of the E-M5 MkII kit. I have only started using it but have found it to be very soft so is going back...
I have a Pana GM1 which I fine pretty awesome for Street, A Oly E-M5 II for general stuff and a Nikon D750 with the 35mm f1.8 FX lens.
The M4/3 stuff is great, really really great. The D750 is pretty awesome. The images are more detailed and have a smoother, sharper look to them but only...
I have both. For me the 15mm has better colour and is slightly sharper. It also has something about it I just love, not sure what it is but propably just how it draws to image on the sensor. I use it for street and can get in pretty close which can make some of my images pretty dramatic.
Sukhy by Andy West, on Flickr
Met this street shooter in 'The Lanes' in Brighton, East Sussex.
His name is Sukhy and he teaches photography out in the streets, cool guy!
Some street from an afternoon Street walk with Manfrotto. A day out getting paid to do what I love...sweet!
Carnaby St, London by Andy West, on Flickr
Sleepwalking by Andy West, on Flickr
Up Stairs by Andy West, on Flickr
Swerve by Andy West, on Flickr
Not been on here for a long while but am back with M4/3 as my only system so here are a few street shots to be getting on with.
Zoned out by Andy West, on Flickr
View by Andy West, on Flickr
Almost asleep by Andy West, on Flickr
For me the 'Holy Trinity' would be the 15mm f/1.7, 25mm f/1.4 and the 42.5 f/1.2. I have the 15 & 25 and will prob get the 42.5 in the near future to complete me prime set. All these lenses have something special about them that separate them from the rest of the prime line up.
I have found that LR6 is a tad slower on my iMac. It's hardly noticeable but it's deff not faster that's for sure. HDR/PANO is great and having the brush in the grad filter is dead handy, other than that no different to LR5. Still the best of it's type in my opinion.
I was going to sell my 12-35 f2.8 but find it so useful plus it is a truly great lens! 12mm will be great for landscapes and i will be using it this summer when I go to the South of France where the scenery is supposed to be spectacular. 12-35mm is a very useful focal range.
.....And a colour image from France..
This was taken with the Panasonic GM1 and 45-150mm f4-5.6 lens. I was really pleased with the performance of both the GM1 & lens but especially the 45-150!
Esprit Man by andywest1, on Flickr