SUMX Measure referencing another Measure

Hi all,

I am writing a SUMX + IF formula that references another formula and the results are just slightly different than they're supposed to be.

Screenshot of table visual

Measures

Measure = 
CALCULATE(
SUM( REVENUE[USD_BUDGET_AMT] )
, REVENUE[GL_REVENUE_CATEGORY_CD] = "BRR"
|| REVENUE[GL_REVENUE_CATEGORY_CD] = "Billable Run Rate"
)

Measure 2 = 
CALCULATE(
[Measure]
, REVENUE[GL_SEG4_TIER2_DESC] = "Wavelengths"
|| REVENUE[GL_SEG4_TIER2_DESC] = "IP"
|| REVENUE[GL_SEG4_TIER2_DESC] = "Private Line"
|| REVENUE[GL_SEG4_TIER2_DESC] = "Dark Fiber"
)

Measure 3 = 
CALCULATE(
[Measure]
, REVENUE[GL_SEG4_TIER2_DESC] = "Colocation and Data Center"
)

Measure 4 = 
SUMX( 
REVENUE
, IF(
REVENUE[PROJECT] = "Hamburg Colo2 Expansion"
, [Measure 3]
, [Measure 2]
)
)

I am trying to make 'Measure 4' return the same values as 'Measure 2' (or 'Measure' for each of the product lines that are filtered in 'Measure 2') but for some reason 'Measure 4' is nearly always slightly higher than 'Measure'/'Measure 2' and after many hours of forum searching and keyboard smashing, I am finally defeated.

Any ideas?

Data model in case it ends up being relevant:

Thanks