【求助】請問 4031B 跟 CT-511C

請問各位先進 , 我是用 8m adsl
我家有兩台小烏龜 ( 4031B 跟 CT-511C)
我進去看裡面的連線資訊分別為 :

4031B :
Downstream Interleaved Channel: 6484 kbps
Upstream Interleaved Channel: 640 kbps
Downstream Noise Margin: 10 dB
Upstream Noise Margin: 7 dB
Downstream Attenuation: 41 dB
Upstream Attenuation: 22 dB

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CT-511C :
Adsl Line Status OPERATIONAL
Adsl Mode G.DMT
Up Stream 640 kb (Interleave)
Down Stream 6816 kb (Interleave)
Attenuation Near End: 22.0
Far End: 23.0
SNR Margin Near End: 6
Far End: 9

請問怎麼辦別哪台烏龜好呢 @@a

兩台好像不一樣意思