Comparison

Tinted Iris vs Grape's Treasure

Dunn-Edwards DE5961 and Vista Paint 1234, ΔE 2.78 apart

Dunn-Edwards Tinted Iris DE5961 on a wall, hex #C4B7D8
Tinted Iris Dunn-Edwards DE5961
Vista Paint Grape's Treasure 1234 on a wall, hex #C0B0CF
Grape's Treasure Vista Paint 1234
Zeytin’s verdict · ΔE 2.78Close cousins. Paint a sample of each before you choose.

Dunn-Edwards Tinted Iris (DE5961) and Vista Paint Grape's Treasure (1234) measure a delta-E of 2.78 apart. Tinted Iris is 3.6 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 18.4 and 17.8. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Grape's Treasure depth in Dunn-Edwards's line, start from its LRV of 47.0 rather than matching by name.

Is Dunn-Edwards Tinted Iris the same color as Vista Paint Grape's Treasure?

Not quite, but close - Dunn-Edwards Tinted Iris and Vista Paint Grape's Treasure are delta-E 2.78 apart, close enough that most rooms would not show the difference.

What is the delta-E between Dunn-Edwards Tinted Iris and Vista Paint Grape's Treasure?

The measured color distance between Dunn-Edwards Tinted Iris and Vista Paint Grape's Treasure is delta-E 2.78.

Which is lighter, Dunn-Edwards Tinted Iris or Vista Paint Grape's Treasure?

Dunn-Edwards Tinted Iris is lighter than Vista Paint Grape's Treasure by 3.6 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.78 Tinted Iris and Grape's Treasure
LIGHTESTTinted Iris LRV 50.6
DARKESTGrape's Treasure LRV 47.0
SPREAD3.6LRV points

Side by side

measured values
Tinted Iris Grape's Treasure
Brand Dunn-Edwards Vista Paint
Code DE5961 1234
Hex #C4B7D8 #C0B0CF
Light reflectance 50.6 47.0
Undertone violet violet
Chroma 18.4 17.8
Hue angle 306.1° 310.3°
Color family purple purple

Each on its own

full detail