Typed array vs untyped array in ColdFusion

I have the following code:

<cfscript>
data = ['2342bas', 'asqwerewq', '12314', 12421, 1.1];

newdata = arrayNew['Numeric'](1);

for (item in data)  {
    newdata.append(val(item));
    }

writedump(newdata); 


newdata = [];

for (item in data)  {
    newdata.append(val(item));
    }

writedump(newdata);  
</cfscript>

I am getting the following results:

I am wondering why they are different. Does 'Number' force all the data to be floating point?

To get the answer I had to dive into the meta data

<cfscript>
data = ['2342bas', 'asqwerewq', '12314', 12421, 1.1];

newdata = arrayNew['Numeric'](1);

for (item in data)  {
    newdata.append(val(item));
    }

newdata.each(function(value) {
    writeoutput("<br /><b>#value#</b> #getMetadata(value).getName()#");
    });

writeoutput("<hr />");


newdata = [];

for (item in data)  {
    newdata.append(val(item));
    }

newdata.each(function(value) {
    writeoutput("<br /><b>#value#</b> #getMetadata(value).getName()#");
    });
</cfscript>

Results

It is interesting that BigDecimal always has a decimal and Double may or may not. Based on this question, ColdFusion: Get variable type , I never knew their was a way to use a BigDecimal in ColdFusion.