library(RJDemetra)
mod <- x13(ipi_c_eu[,"FR"], x13_spec(benchmarking.enabled = TRUE))
mod$benchmarking
#> $specification
#>  benchmarking.enabled benchmarking.target benchmarking.useforecast
#>                  TRUE    CalendarAdjusted                    FALSE
#>  benchmarking.rho benchmarking.lambda
#>                 1                   1
#> 
#> $benchmarking
#>           original    result   Differences
#> Jan 1990  92.84963  92.85339 -3.753263e-03
#> Feb 1990  95.29209  95.29594 -3.850250e-03
#> Mar 1990  95.15793  95.16177 -3.841299e-03
#> Apr 1990  94.46963  94.47344 -3.808238e-03
#> May 1990  93.86488  93.86866 -3.776868e-03
#> Jun 1990  92.87984  92.88357 -3.728597e-03
#> [...]
#> attr(,"class")
#> [1] "benchmarking"

mod <- x13(ipi_c_eu[,"FR"], x13_spec())
mod$benchmarking
#> $specification
#>  benchmarking.enabled benchmarking.target benchmarking.useforecast
#>                 FALSE    CalendarAdjusted                    FALSE
#>  benchmarking.rho benchmarking.lambda
#>                 1                   1
#> 
#> $benchmarking
#> NULL
#> 
#> attr(,"class")
#> [1] "benchmarking"