It seems to be impossible to choose the right pair of headphones considering only a company they are made by. Therefore, I offer you to take a closer look at the features of Audio-Technica ATH-M50x vs MEZE 99 Neo. They are closed-back and wired. In addition, both of the mentioned devices have an over-ear wearing style.
First, it makes sense to compare their levels of sensitivity which are not very different. It is 99 dB in the case with Audio-Technica ATH-M50x and 103 dB in the case with MEZE 99 Neo. The distinction between their rates of impedance is a little more noticeable. The appliance produced by Audio-Technica has 38 Ohm, while the one created by MEZE has 26 Ohm. With respect to frequency response, the model ATH-M50x works in a range of 15 Hz - 28 kHz, whilst the 99 Neo produces the sound in a range between 15 Hz and 25 kHz.
Even though the headphones Audio-Technica ATH-M50x are intended for monitor and studio use, they don't have a completely neutral sound with a slight emphasis on the lows and highs.
Bass is a real star on the MEZE 99 Neo, being absolutely not overwhelming but packing, in any case, a very good punch. Highs are detailed and practically non-fatiguing.
Audio-Technica ATH-M50x is a better choice for traveling and commuting since this pair of headphones is foldable. However, both of the considered devices come with a carry case. Their headband can be adjusted. Another important thing worth mentioning is the weight. The headphones by MEZE have 250 g, while the ones produced by Audio-Technica weigh 285 g.
MEZE 99 Neo vs Audio-Technica ATH-M50x has in-line control. Moreover, only this appliance is equipped with a microphone. The replaceable cable you get with these headphones is 150 cm long in the case with the first device and 300 cm long in the case with the second one.
The Audio-Technica ATH-M50x is better headphones in this comparison. Check Audio-Technica ATH-M50x price