Comparison Topping D30 VS Topping D50 ?

i back to made this comparison about them. using a Topping TP60 class T solid amplifier and my diy full range speakers 4" ( fostex EF103n), diy USB Cable. Media player: S7 with USB Audio Player Pro (full paid). and ripping a song file from Album " the Hear the difference!" SACD of Stockfish record. track 2. Chis Jones / No Sanctuary Here. D30 : Input range USB: PCM : 16-24bit/44.1-192kHz, hires Dsd: DSD64, DSD128. Typical distortion (@1kHz, sampling rate 96khz)  USB: 0.00062%  SNR (sampling rate 44.1kHz):  USB: 115.7db  Maximum output voltage swing: 2.1Vrms@1kHz D50: input range USB: 44.1KHZ-768KHZ/16Bit-32Bit  DSD64-DSD512（native）  DSD64-DSD256（Dop）  Total Harmonic Distortion @A-weighting:   less than 0.0004% @1kHZ  less than 0.0005% @20HZ-20KHZ  SNR: 122dB@1kHZ  when we was saw specification of both, thebD50 are more better than D30, can accept PCM / DSD up to 768kHz and DSD512. And less distortion a good at D50. all around on the write of that, D50 more better than D30. Questions: Am I still with my choice ? D30 such as my choice on my last video. Answer : i : YES... absolutely why? at now i no have a original file dsf DSD512 or pvm 768kHz ( original) and i &m not yet need DAC&to processing it. why about distortion? I can not distinguish the difference 0.0002% of them for my ears, my be measurement with the instrument. and another reason of my choice i can tell on my next video. thank you for your watching. regards ed