The phrase "although not as substantially" is correct and usable in written English.
It can be used to compare two things, indicating that one is less significant or impactful than the other.
Example: "The new policy will improve efficiency, although not as substantially as the previous one did."
Alternatives: "though not as significantly" or "albeit to a lesser extent".
Initially, the growth rate of heat-treated corals did decrease, although not as substantially as those of cold-treated corals; however the pressure over PSII remained unchanged until after 5 d.
Similarly, inequities in women's empowerment in the 31 countries are associated with lower maternal health service utilization, although not as substantially as for the other 2Es.
Premiums are also substantially higher than average, although not as high as in Charlottesville, in southwestern rural Georgia, certain Colorado ski resort towns, the Connecticut suburbs of New York City, and large parts of Wisconsin and Wyoming, among other places.
Although not as common in your average film as the cumshot or even its popular subset, the facial, it picks up substantially more search traffic on Google, was one of Pornhub's top overall searches in 2011 and 2012, and continues to be a top regional search term in parts of America.
Even as murders rose, the country's overall crime rates did not increase as substantially.
Although that should improve the quality of the care they get, coordination may not cut costs as substantially as people expect.
And although not quite as public a symbol as the Bank of England independence - but unique in terms of labour's history none the less - we have cut capital gains tax substantially.
For both algorithms, the time and memory consumption of the preprocessing phase increases as network size increases, although not substantially; and WW preprocessing consumes more time and moderately more memory than MS preprocessing.
Although awareness of autism and the burdens it can sometimes bring has probably increased substantially in the past 10 or 15 years, it is not as evident that understanding and acceptance of people affected by autism have increased to a comparable extent.
These data suggest that although the spread towards high-risk currently achieved by SNP67 is not as large as that obtained from classical phenotypic markers, SNPs may add substantially to classic factors when used together.
