I am annotating data from a GSE dataset. I want to check that the row.names are equivalent to ID to ensure that there are no mistakes.

gse10072 <- getGEO('gse10072', GSEMATRIX=TRUE)
g72 <- gse10072[[1]]
total <- pData(featureData(g72))

t1 <- data.frame(row.names(total))
t2 <- data.frame(total$ID)

why is it that when I perform a comparison
identical (t1,t2)

the output is false?

I'm sure it seems trivial, but I would like to compare other columns in the future. Why do two seemingly identical data.frames appear to be different?
 

The row names are actually derived from the IDs, so there really isn't a need to check, but in case you wanted to:

> library(GEOquery)
> g72 <- getGEO('gse10072', GSEMatrix=TRUE)[[1]]
ftp://ftp.ncbi.nlm.nih.gov/geo/series/GSE10nnn/GSE10072/matrix/
Found 1 file(s)
GSE10072_series_matrix.txt.gz
Using locally cached version: /var/folders/21/8t47kwys6vqb8606kdfn71780000gn/T//RtmpEmvD0e/GSE10072_series_matrix.txt.gz
Using locally cached version of GPL96 found here:
/var/folders/21/8t47kwys6vqb8606kdfn71780000gn/T//RtmpEmvD0e/GPL96.soft 
> total <- fData(g72)
> t1 <- row.names(total)
# Convert to character vector from factor!
> t2 <- as.character(total$ID)
> identical(t1,t2)
TRUE

Comparing a character vector to a factor (total$ID is a factor) will result in identical() returning FALSE.  However, after converting to a character vector, identical() returns TRUE.