Comparison

Montgomery White vs Rotunda Gold

Benjamin Moore OC-148 and Vista Paint 0895, ΔE 1.04 apart

Benjamin Moore Montgomery White OC-148 on a wall, hex #F4E2C0
Montgomery White Benjamin Moore OC-148
Vista Paint Rotunda Gold 0895 on a wall, hex #F4E0BF
Rotunda Gold Vista Paint 0895
Zeytin’s verdict · ΔE 1.04Twins, almost. Only daylight on a big wall tells them apart.

Benjamin Moore Montgomery White (OC-148) and Vista Paint Rotunda Gold (0895) measure a delta-E of 1.04 apart. Rotunda Gold is 2.1 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 18.9 and 18.7. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Montgomery White depth in Vista Paint's line, start from its LRV of 73.9 rather than matching by name.

Is Benjamin Moore Montgomery White the same color as Vista Paint Rotunda Gold?

Not quite, but close - Benjamin Moore Montgomery White and Vista Paint Rotunda Gold are delta-E 1.04 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Montgomery White and Vista Paint Rotunda Gold?

The measured color distance between Benjamin Moore Montgomery White and Vista Paint Rotunda Gold is delta-E 1.04.

Which is lighter, Benjamin Moore Montgomery White or Vista Paint Rotunda Gold?

Vista Paint Rotunda Gold is lighter than Benjamin Moore Montgomery White by 2.1 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.04 Montgomery White and Rotunda Gold
LIGHTESTRotunda Gold LRV 76.0
DARKESTMontgomery White LRV 73.9
SPREAD2.1LRV points

Side by side

measured values
Montgomery White Rotunda Gold
Brand Benjamin Moore Vista Paint
Code OC-148 0895
Hex #F4E2C0 #F4E0BF
Light reflectance 73.9 76.0
Undertone yellow yellow
Chroma 18.9 18.7
Hue angle 87.3° 84.6°
Color family tan tan

Each on its own

full detail