Short answer
Both are desktop amplifiers, $350 against $399.
The SMSL H200 reaches 100 dB on 567 of the 567 models here, the Lake People G103-S Mk II on 566.
| Specification | Lake People G103-S Mk II | SMSL H200 |
|---|---|---|
| Power into 32Ω | 1.0 W | 2.0 W |
| Power into 150Ω | 804 mW | 499 mW |
| Power into 300Ω | 580 mW | 300 mW |
| Power into 600Ω | 340 mW | 150 mW |
| Output impedance | 0.1 Ω | <0.1 Ω |
| Output noise | 6.15 µV | not published |
| Price | $350 | $399 |
| Headphones it reaches 100 dB on out of 567 | 566 | 567 |
Not published means the maker leaves it out, so that axis cannot be compared.
| Balanced | Lake People G103-S Mk II | SMSL H200 |
|---|---|---|
| Socket | no separate rating | 4.4mm / 4-pin XLR |
| Power into 32Ω | — | 5.0 W |
| Power into 300Ω | — | 1.0 W |
| Output impedance | — | <0.1 Ω |
| Output noise | — | not published |
| Headphones it reaches 100 dB on out of 567 | — | 567 |
Only the SMSL H200 has a separate balanced rating from its maker; through it, it reaches 100 dB on 567 of the 567 models here. The Lake People G103-S Mk II may still have a balanced socket — its spec sheet simply gives no figure for one, so there is nothing to put beside it.
| Load | Lake People G103-S Mk II | SMSL H200 |
|---|---|---|
| 32 Ω | Published | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Published | Published |
| 600 Ω | Published | Published |
Both makers publish a power rating. Lake People G103-S Mk II publishes at 32 Ω, at 300 Ω and at 600 Ω; SMSL H200 at 32 Ω, at 300 Ω and at 600 Ω. The other rows are worked out from those.
The two publish at the same loads, which is the one case where the rows of this table can be read straight across.
1 headphone reaches 100 dB on the SMSL H200 but not on the Lake People G103-S Mk II — Symphonium Titan.
566 of the 567 models here reach 100 dB on both.
Headroom is at a 100 dB SPL peak.
The widest gap on the list is the Shure SE846: SMSL H200 has +45 dB of headroom there against +38 dB. 7 dB is about 5 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for SMSL H200 because that maker publishes no output noise figure.
| Headphone | Impedance | Needs | Lake People G103-S Mk II headroom | SMSL H200 headroom | Lake People G103-S Mk II hiss | SMSL H200 hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +38 dB | +45 dB | 30 dB | not published |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +18 dB | +25 dB | 10 dB | not published |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +32 dB | +31 dB | 8 dB | not published |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +30 dB | +27 dB | 4 dB | not published |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +20 dB | +24 dB | 3 dB | not published |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +24 dB | +21 dB | -3 dB | not published |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +19 dB | +17 dB | -7 dB | not published |
| HiFiMAN Susvara | 60 Ω | 50 mW | +14 dB | +13 dB | -9 dB | not published |
The SMSL H200 costs $49 more than the Lake People G103-S Mk II. Out of the 567 models here, that difference buys 1 more model driven to 100 dB.
Nothing runs the other way: there is no axis here on which the cheaper of the two does better.
Only published figures count here; blank axes are counted separately.
Each in full: Lake People G103-S Mk II and SMSL H200.