I currently have a Lehart D flute as well as a nice new Aebi blackwood in Bb.
Unfortunately, I consider those two much too difficult to compare!
I can say this about flutes being “difficult” versus “easy” to play, though.
For me, personally, I have a flute that I consider the easiest of all to play.
It is my Murray.
I get EVERYTHING I want out of this flute.
I am NEVER going to be a pro, because that is not what I aspire to.
I rarely if ever play with groups of others, so whether or not my flute is in perfect tune, is a somewhat moot point. (And can be adjusted easily with changes in emboucher or tuning slide, at least enough to play along with most recordings. Hence, the “work” part…) All my flutes are “in tune” enough to suit my personal standards, playing for my own enjoyment, at home. However, it has been demonstrated to me by others that some of them are much more “in tune”… The Lehart is one of those.
Some of them require much more “work” to play ~ that would be my Hammy and my Byrne.
I like some of them for the sheer pleasure of their aesthetic ~ my Doyle flute is such a beast.
Some are so impeccably crafted, so “easy” to play, so in tune, and so good to listen to, that playing them is a gift ~ that would be my Olwell.
All those things are the variables that combine to make you the sort of player you are or aspire to be.
That said, my Murray flute is my personal favorite. It fits my hands just right. I like how it looks. (Mine’s not very perfect, being one of those flutes that you can detect where the “twigs” were growing out of the branch…) It’s 2nd octave just “sings” ~ (although that is subjective, someone once asked me if I was sure it wasn’t an Eb flute
) It is easy for me to play. I can get any kind of sound that “I” want out of it. I enjoy it the most. It’s exactly what I look forward to at the end of a long workday. I’m sorry, but most evenings, I am not inclined to take out my flute to “work” at it, but to create a few tunes that please me and help me unwind at the end of the day. And that’s all. 
Berti, when you try out the various flutes, see what it is that gives you the most personal pleasure, and go in that direction. Some folks want a challenge, and that’s what they are looking for.
I love my Lehart flute, as well as my Aebi flute, but for different reasons.
I love all my flutes, for different reasons.
I can compare them, but they each offer something special of their own.
So just about anyone can have an opinion on the various flutes, if they are a personal “good fit” then they will tell you, the flute is Great! If they tried one and didn’t get along with it very well, they may say “I prefer something else” ~ then there’s always the idea that you try someone’s flute, like it, order one and it’s not quite the same! Things vary ~
Holy crapp, I’ve written a book. Somebody stop me!
Mary