Oh my - I didn’t realise there were other many Solen Lesoeuf flute players out there! Welcome guys to the fan club 
Toonboog - if you’re devil’s advocate and you’ve settled on a Lejeune, here’s another take!
I have 2 Solen Lesoeuf flutes; Rudall Rose, Hawkes, Boosey Hawkes Siccama, Jezequel as well as Pratten Perfected and don’t understand why flute players would pick a favourite when they can make it possible to have more
Someone mentioned the design differences as well as geography. I met Solen several times and am really thrilled by her flutes. Her waiting time was >1 year, but well worth it. I didn’t know what the design differences were. The Rudall Rose is gorgeous, but weak at the 3rd octave and also needs servicing to get it back to spec with a contemporary flute. If this is the same design which Solen uses for her D keyed flute, I can reach the 3rd octave A no problems at pitch (if you find it amusing to terrify pets and neighbours this way). She serviced it for me out of courtesy - hers - when I was travelling through France last year. Most makers are really lovely people. They don’t make flutes without loving their job. Solen is unique for her detailing of her spectacular keywork and also one of the few makers who make a low Bb keyed flute (not all do this) and you can get personalised help with key distances if you have really short fingers or struggle with small spreads. Her embouchure bushings are really special too. As Vermichou says - her flutes are truly beautiful. A flute maker doesn’t put all the attention to the block design, keys, embouchure and historical research just to make it look pretty. Unlike some of the makers, Solen is a flute player too.
I’ve no experience with the other French makers, including LeCoant, LeBot but their models are somewhere in between. If you are looking for an everyday session weapon, most french contemporary makers will be spot on. If you’re looking for something exceptional at cost, maybe Jezequel, Jourdan and the other few guys down the Lyon side which I’ve not been able to get to are worth scoping out.
Pratten Perfected designs seem quite common unless you are after keys (is this true for you all? I only found a handful of makers who were still making keyed Pratten Perfecteds with most doing Rudall Rose variants or their own hybrids). They will need a honk of air, wider finger spread maybe. I love my Pratten Perfected too but it’s the Solen Lesouef one which I find I am drawn to pull out most often. It is the easiest to live with; the most beautiful (well, Rudall Rose is nice, but shame about the pinched 3rd octave D). It’s very loud but I think that is down to the player. It has a real honk in the first octave and loud penetration in the third with a creamy smooth second octave. I’m not doing ITM either so the 3rd octave is important to me. If I am splitting hairs, I am sure the Jezequel is pitch perfect on the pitch tuner but I can’t hear any practical difference. Loudness - I’ve heard Pratten Perfecteds played softer than a Palanca traverso. The head assembly of the Lesoeuf is very well done, whereas I was shocked to find some of my other flutes, have a head cap…and a gap between that and an inner cork with nothing to hold the cork in its position other than wall friction!
Good luck. Whatever happens, we need to get the Lesouef flute players on a channel
