Which has the better picture for a bright room?

The Samsung S95F. Its QD-OLED panel reaches higher brightness and keeps colors saturated, and its Glare Free coating cuts reflections. The LG G5 is also glare-free but trails on peak brightness and color volume.

Which is better for gaming?

Both run up to 165Hz with VRR and ALLM, so motion is similar. The Samsung adds FreeSync and G-Sync support; the LG gives you a fourth HDMI input, which matters if you own several consoles.

Both are OLED panels with the same underlying wear characteristics, and neither maker publishes a lifespan figure. QD-OLED can be more prone to burn-in under static logos at high brightness, so vary content on either set.

Is the Samsung worth stepping up to over the LG?

If picture quality is your priority, yes: reviewers rank the S95F among the best they have tested. If you need four HDMI ports, Wi-Fi 6E or wide viewing angles, the LG is the more practical set.

Do I need a soundbar with either?

Yes, for serious movie sound. Reviewers say the Samsung's audio weakens at high volume, and the LG's built-in speakers are basic. Either set benefits from a soundbar or receiver.

Which is better for wall mounting?

The LG G5 is built as a gallery-style wall display, so it sits flush. The Samsung is very thin too, but its stand and back-panel reports make the LG the safer flush-mount choice.

Samsung S95F QD-OLED TV vs LG G5 OLED evo TV

Both are 65-inch 4K OLEDs with 165Hz gaming and glare-free coatings, so the choice comes down to priorities. The Samsung S95F is the brighter QD-OLED with more saturated color and three HDMI 2.1 ports; reviewers rate its picture at the top of what they have tested, though several flag weak built-in sound and a few report panel-coating or back-panel defects. The LG G5 is a strong all-rounder with four HDMI ports, Wi-Fi 6E and wide viewing angles, and it is the safer pick if you want more inputs or a wall-mounted gallery design. Buy the Samsung for the best picture; buy the LG for connectivity and everyday flexibility.

Choose the Samsung S95F if picture brightness, color saturation and anti-glare performance matter most and you use a soundbar or AV receiver.
Choose the LG OLED65G5WUA if you need four HDMI inputs, Wi-Fi 6E and wide viewing angles, or plan to wall-mount it flush.

Prices

Samsung S95F QD-OLED TV: $1,747.95 at Amazon (last seen Nov 9)