Comparison

Smoke Gray vs Downing Slate

Benjamin Moore 2120-40 and Sherwin-Williams SW 2819, ΔE 1.6 apart

Benjamin Moore Smoke Gray 2120-40 on a wall, hex #757B82
Smoke Gray Benjamin Moore 2120-40
Sherwin-Williams Downing Slate SW 2819 on a wall, hex #777F86
Downing Slate Sherwin-Williams SW 2819
Zeytin’s verdict · ΔE 1.6Twins, almost. Only daylight on a big wall tells them apart.

Benjamin Moore Smoke Gray (2120-40) and Sherwin-Williams Downing Slate (SW 2819) measure a delta-E of 1.6 apart. They sit within 1.2 LRV points of each other, so neither will look brighter than the other on the same wall. Both carry a similar amount of color, at chroma 4.6 and 5. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Smoke Gray depth in Sherwin-Williams's line, start from its LRV of 19.6 rather than matching by name.

Is Benjamin Moore Smoke Gray the same color as Sherwin-Williams Downing Slate?

Not quite, but close - Benjamin Moore Smoke Gray and Sherwin-Williams Downing Slate are delta-E 1.6 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Smoke Gray and Sherwin-Williams Downing Slate?

The measured color distance between Benjamin Moore Smoke Gray and Sherwin-Williams Downing Slate is delta-E 1.6.

Which is lighter, Benjamin Moore Smoke Gray or Sherwin-Williams Downing Slate?

Sherwin-Williams Downing Slate is lighter than Benjamin Moore Smoke Gray by 1.2 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.6 Smoke Gray and Downing Slate
LIGHTESTDowning Slate LRV 20.8
DARKESTSmoke Gray LRV 19.6
SPREAD1.2LRV points

Side by side

measured values
Smoke Gray Downing Slate
Brand Benjamin Moore Sherwin-Williams
Code 2120-40 SW 2819
Hex #757B82 #777F86
Light reflectance 19.6 20.8
Undertone blue cast blue cast
Chroma 4.6 5.0
Hue angle 260.8° 253.1°
Color family gray gray

Each on its own

full detail