These are not the same size of amplifier: NAD C 700 V2 has roughly 2x the power of NAD C316BEE V2. That is about 3dB, so it is a question of room size and how hard your speakers are to drive, not of one being the better amplifier.
| Area | Better | Why |
|---|
| Power | A | NAD C 700 V2 has more power - 80W against 40W into 8 ohms. That is about 3dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Grip on hard loads | evenly matched | Both behave much the same into 4 ohms - output barely increases (80W and 40W). |
| Bass control | B | NAD C316BEE V2 has the higher damping factor (200 vs 90), which usually means a tighter grip on a woofer. Above about 100 the returns flatten out, so read this as a tendency rather than a ranking. |
| Noise floor | B | NAD C316BEE V2 is the quieter design on paper - 95dB against 84dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | A | NAD C 700 V2 has a DAC on board; the other needs an external one, which is another box, another power lead and another purchase. |
| Streaming | A | Only NAD C 700 V2 has AirPlay 2, Roon and BluOS. |
| Use with a TV | depends | Only NAD C 700 V2 has HDMI, so the television can drive it directly and one remote controls the volume. If the system is for music only, this changes nothing. |
| Room to grow | A | Only NAD C 700 V2 offers preamp outputs - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Headphones | depends | Only NAD C316BEE V2 has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | NAD C 700 V2 is Class D and NAD C316BEE V2 is Class A/B. Class D runs cool and draws almost nothing at idle; Class A/B runs warm and is the long-established mainstream choice. Modern examples of both measure well - judge by the rest of the page. |
| Shelf space | depends | NAD C 700 V2 takes up about 48% less shelf area (651cm² against 1253cm²). |
| Price | B | NAD C316BEE V2 costs less - $499 against $1,599 at list. |
| Watts per dollar | B | NAD C316BEE V2 is the cheaper watt - about $12 per watt against $20. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A NAD C 700 V2 B NAD C316BEE V2
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both amplifiers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
NAD C 700 V2 is ahead, but on only 1 of the measured areas, and it costs about 3.2x the price. That is a lot of money for a narrow margin - NAD C316BEE V2 is the sensible buy unless a specific feature above decides it for you. Start with the room. In a large or open-plan room, or with speakers that are hard to drive - low sensitivity, or an impedance that dips - NAD C 700 V2 has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 40 watts is already more than most people ever use, and the extra 40 watts would be headroom you pay for and never hear. If this sits under a television, NAD C 700 V2 is the one to buy - HDMI ARC means the TV remote controls the volume and there is no second box in the way.
What a spec sheet cannot show: how either sounds with your speakers, how the controls feel day to day, and what the app is like to live with - which is where most all-in-one amplifiers are actually won or lost. Power figures are the manufacturers' own and are not measured to a common standard, so treat small differences as noise. If you can hear both, that will tell you more than any row above.