Test

.ecwid-productBrowser-CategoryPage-13217222 tr:nth-child(4) td.ecwid-productBrowser-productsGrid-cell:nth-child(1) div.ecwid-productBrowser-price:after {
content: "DESCRIPTION";
display: block;
font: 25px arial;
color: blue;
}

.ecwid-productBrowser-CategoryPage-13217222 tr:nth-child(4) td.ecwid-productBrowser-productsGrid-cell:nth-child(2) div.ecwid-productBrowser-price:after {
content: "Something";
display: block;
font: 18px arial;
color: blue;
}

.ecwid-productBrowser-CategoryPage-13217222 tr:nth-child(10) td.ecwid-productBrowser-productsGrid-cell:nth-child(1) div.ecwid-productBrowser-price:after {
content: "Something completely, totally different. Not the thing that you've seen on previous product";
display: block;
font: 15px arial;
color: blue;
}

.ecwid-productBrowser-CategoryPage-13217222 tr:nth-child(10) td.ecwid-productBrowser-productsGrid-cell:nth-child(2) div.ecwid-productBrowser-price:after {
content: "Something else";
display: block;
font: 22px arial;
color: blue;
}