I have both the Solia and the Sedu.
I purchased the solia months before the sedu- and at the time, I was very pleased with it (the hot pink 1"). I didn't have any issues with snagging and it left my hair straight and silky without the damage.
However, after getting my 1" sedu (the regular - not the revolution) I'd have to say I like it A LOT better. The pros of the sedu outweigh that of the solia IMO.
The sedu is MUCH lighter. When I told my sister to hold it - her eyes bulged out of her head b/c it was so lightweight lol - plus, she's held the solia and she knows that its kind of on the heavier side period.
Also, although the solia never fried my hair, the SMOKE was something out of this world.
I wasn't even putting it on the highest setting, and the smoke was enough to choke on! (no lie lol). You could smell it all over the house.
And another thing I like about the sedu, is I can actually do ONE pass if I want to - although I usually do two, since I go over again to give my hair a nice bump/bend at the ends. With the solia I had to go over my hair about 3-4 times, on a decent, not too hot heat setting.
The only down side to the sedu is that, like others mentioned, you can't press the plates together b/c it gets too hot.
But I've been flat-ironing for years, so I worked around that with no issue. Plus, you can get the hair silky and straight without the added pressure of squeezing the plates.
The solia is a high quality flat-iron, but I'm reppin the Sedu now!
That's my two cents.