Comparison

Waterfall vs Summer's Secret

Sherwin-Williams SW 6750 and Vista Paint 7547, ΔE 2.21 apart

Sherwin-Williams Waterfall SW 6750 on a wall, hex #C0E3DA
Waterfall Sherwin-Williams SW 6750
Vista Paint Summer's Secret 7547 on a wall, hex #C6E7DB
Summer's Secret Vista Paint 7547
Zeytin’s verdict · ΔE 2.21Close cousins. Paint a sample of each before you choose.

Sherwin-Williams Waterfall (SW 6750) and Vista Paint Summer's Secret (7547) measure a delta-E of 2.21 apart. They sit within 0.1 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 13.2 and 13.3. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Waterfall depth in Vista Paint's line, start from its LRV of 70.9 rather than matching by name.

Is Sherwin-Williams Waterfall the same color as Vista Paint Summer's Secret?

Not quite, but close - Sherwin-Williams Waterfall and Vista Paint Summer's Secret are delta-E 2.21 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Waterfall and Vista Paint Summer's Secret?

The measured color distance between Sherwin-Williams Waterfall and Vista Paint Summer's Secret is delta-E 2.21.

CLOSEST PAIRΔE 2.21 Waterfall and Summer's Secret
LIGHTESTSummer's Secret LRV 71.0
DARKESTWaterfall LRV 70.9
SPREAD0.1LRV points

Side by side

measured values
Waterfall Summer's Secret
Brand Sherwin-Williams Vista Paint
Code SW 6750 7547
Hex #C0E3DA #C6E7DB
Light reflectance 70.9 71.0
Undertone green undertone green undertone
Chroma 13.2 13.3
Hue angle 177.6° 170.4°
Color family teal teal

Each on its own

full detail