I've been following both XCOM:EU and Xenonauts closely and personally I also go with the latter, XCOM:EU just looks and feels too different from how I remember UFO:EU, at times even laughable. While the original was like Japanese psychological horror that gave you goosebumps from your very first turn, XCOM:EU looks and feels too action-oriented. I really couldn't see myself sitting down and taking my time with all the strategic considerations, like wondering what might be behind that bush, are my soldiers going to get mowed down while walking past that window or opening that door, or that damned Chryssalid is going to zombify my soldier no matter how well I've got him covered and reserved time units for reaction fire.
But to each his own.